US raid ordered by Persian leader (6)

I believe the answer is:

darius

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'persian leader' is the definition.
The definition suggests a singular noun which matches the answer.

'us raid ordered by' is the wordplay.
'ordered' indicates anagramming the letters.
'by' says to put letters next to each other.
'raid' with letters rearranged gives 'dari'.
'us' after 'dari' is 'DARIUS'.

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(Other definitions for darius that I've seen before include "Name of some Persian kings" , "A king of Persia" , "Name of three kings of Persia" , "Ancient Persian king" .)

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